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X-ray CT device

A technology of X-rays and components, which is applied in the field of X-ray projection devices, can solve problems such as spending considerable time and consuming X-ray life

Inactive Publication Date: 2008-07-09
GE MEDICAL SYST GLOBAL TECH CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Each scan takes considerable time as the die must be precisely positioned so that its center coincides with the concentricity of the scan
In addition, the time required for calibration alone consumes the lifetime of the X-ray

Method used

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Embodiment Construction

[0028] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments for carrying out the invention will be described below with reference to the accompanying drawings. However, the present invention is not limited to the preferred embodiment for carrying out the invention. FIG. 1 shows a block diagram of an X-ray CT apparatus. This device is an example of a preferred embodiment for carrying out the present invention. According to the structure of this device, an example of the best embodiment for implementing the present invention related to the X-ray CT device is shown, and based on the working principle of the device, it is shown for implementing the best embodiment of the present invention related to the preprocessing method. An example of the form.

[0029] As shown in FIG. 1 , the device has a scanning frame 2 , an imaging table 4 and an operation console 6 . The scanning gantry 2 has an X-ray tube 20 . The X-rays (not shown) emitted by the X-ray tube 20 ar...

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Abstract

Disclosed is a pre-processing method for correcting reference data and X-ray CT device performing the pretreatment, wherein the method consists of, determining the length of the straight line linking X-ray focal point and each channels of the X-ray detector and cut by a scanned concentric circle, correcting projection data with data representing these lengths, wherein the circles have different radiuses, and the size of the circles corresponds wit the size of the view coverage.

Description

technical field [0001] The present invention relates to a preprocessing method and an X-ray CT (Computed Tomography) device, in particular to a method for preprocessing projection data collected by the X-ray CT device and an X-ray projection device for preprocessing the projection data. Background technique [0002] The X-ray CT device scans the object and preprocesses the obtained projection data. Pretreatment includes reference water calibration. This is an indispensable preprocessing to obtain a water-based CT value. The reference water calibration utilizes the projection data obtained by scanning the water model (phantom) (for example, refer to Patent Document 1: the third page of Japanese Unexamined Publication No. 7-327979, Figure 8 ). [0003] To maintain calibration accuracy, the reference data is regularly updated. To update the baseline data, calibration scans using the water phantom are performed periodically. [0004] Prepare multiple water models correspond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03G06T1/00
Inventor 王学礼丁玮晏雄伟乡野诚
Owner GE MEDICAL SYST GLOBAL TECH CO LLC